设计了全固态连续单横模671 nm红光激光器。利用880 nm LD双端端面泵浦Nd:YVO4复合晶体,实现了均匀泵浦并改善了激光晶体热效应;考虑到影响倍频转化效率的各种因素,优化设计了Z字形四镜激光谐振腔,采用Ⅰ类临界相位匹配晶体LBO作为腔内倍频晶体;当泵浦功率为42.5 W时,获得了5.2 W的连续单横模671 nm红光输出,光-光转化效率达到12.2％,激光器长期功率稳定性优于±2.5％(1 h)。

An all-solid-state CW TEM00red laser at 671 nm is designed and reported in this paper. By the way of Nd:YVO4 composite crystal dual-end-pumped by a laser diode at the central wavelength of 880 nm, the thermal effect of the gain medium is reduced. The Z shape four-mirror folded cavity is designed to improve the frequency-doubling efficiency. Using a type-I critical phase-matching LBO as the intracavity frequency doubler, the maximum output power of 5.2 W is obtained under pump power of 42.5 W with an optical-to-optical conversion efficiency of 12.2％. The stability of the laser output is better than ±2.5％ in the given one hour.